Global Range: Sporobolus silveanus occurs primarily in the eastern fifth of Texas and small portions of adjacent southwestern Louisiana and southeastern Oklahoma. The distribution map in Weakley and Peterson (1998) indicates that Sporobolus silveanus is found primarily in the pine forest and oak woodland belts of southeast Texas and adjacent Louisiana, but it also indicates seemingly isolated records from prairie regions of northeast Texas and southeast Oklahoma, where the species is locally abundant in some prairie remnants. Sporobolus silveanus may be overlooked by general collectors, and it is likely that its distribution is (or historically was) more continuous across its range than the current information suggests.
In Texas, occurrence of this species is documented from Angelina, Brazos, Galveston, Hardin, Harris, Jasper, Lamar, Newton, Orange, Rains, Tyler and Van Zandt counties (Texas BCD, 1999); information about known occurrences in Franklin County (Daphne Prairie) and Hunt County (Clymer Meadow and other remnants) has not yet been developed (Jim Eidson, pers. comm., 1999). In Louisiana it has been collected from Allen and Calcasieu parishes (Thomas and Allen, 1993). In Oklahoma it is known from Jeter Prairie in Bryan County (Jim Eidson, pers. comm., 1999).